Why Sister Moon Exists

A note from the founder.

I did not set out to build a brand.

I set out to understand my own body. And then, almost without meaning to, I made something.

After the birth of my daughter in 2019, I started learning about the infradian rhythm, the monthly hormonal cycle that shapes a woman's energy, mood, creativity, and physical needs across a 28-day rhythm. Nobody had ever taught me this, or at least I never discovered this powerful orientation to my own body before. I had been living in my body for decades and this was new information. It felt like being handed a map I had always needed but never knew existed.

I am an artist with a love of printmaking and book arts. So naturally I started playing with paper.

I was inspired by the Planisphere, an ancient analog tool used to read the night sky. You hold it in your hands and turn it toward the stars. I kept thinking: what if something like this existed for a woman's cycle? What if you could hold your own rhythm in your hands, and build a meaningful routine by simply knowing where you are through the different phase?

So I made one. For myself. For my daughter. As a way of passing something forward that I wished someone had passed to me.

The Infradian Rhythm Volvelle was never meant to be a product. It came through me more like a gift. And when I looked at what it was asking of the women who might use it, I realized it was also a kind of quiet resistance.

Because the values baked into this tool are not values I invented. They are values women have always carried. They just need reminding.

Your body's intelligence is worth honoring.

Not optimizing, not tracking for someone else's data set. Honoring. Your cycle is a biological wisdom that tells you when to push, when to rest, when to create, and when to let go. When you learn to read it, you stop fighting yourself. That is empowerment in the most practical sense of the word.

Your inner world is yours.

In a culture that is constantly asking women to share, perform, and be legible to systems that were not built for them, keeping something private is a radical act. Your cycle data does not belong to a corporation. It belongs to you.

Beautiful routines beat perfect ones.

The wellness industry sells exhaustion dressed up as discipline. Five AM alarms. Optimization. The pressure to be the same person every single day. Your hormonal cycle makes that impossible by design. Working with your rhythms instead of against them is not a workaround. It is the actual way.

These are not values I built Sister Moon around. They are values that were already in the tool when I made it. I just had to look closely enough to see them.

You are the new generation of an ancient tradition.

With Love,

Christina

Founder, Sister Moon